Rod-packing.



PATENTED Nov. ze, 1907 T. A'. JOHNSTON.

ROD PACKING.

PBLIOATION FILED MAY 2, 1907.

/A "Ivi nu Gef@ A," THOMAS A. JOHNSTON, OF CHADRON, NEBRASKA.

ROD-PACKING.

T o all whom 'it may concern:

Be it known that I, THOMAS A. JOHNSTON, a citizen of the United States, residing at Chadron, in the county of Dawes and State of Nebraska, have invented certain new and useful Improvements in Rod-Packing, of which the following is a specification.

This invention is a rod-packing, and has for `its object to provide an improved packing which will permit lateral motlon or v1 ration `of the rod without the efficiency of the packing being impaired.

In the accompanying drawing, Figure 1 is an end view of the invention. Fig. 2 is a side elevation. Fig..,3 is a longitudinal section. Fig. 4 is a vertical section.

Referring specifically to the drawing, 1 denotes a stuling-boxwhich is in two sections indicated at 2 and 3, respectively. The sections are connected by bolts 5 -passing .throu h flanges 6 and are fastened to the cylin er head 4 in any suitable manner. On

.I Lone side ofthe stuffing-box is' a neck 7 having an opening 8 which communicates with the interlorof the box. The neck is threaded Von the outside to receive a ca 9 for closing its outer end. The neck is 4a so in two secthe cap 9.

tionsor halves one of which is on art 2 and the other on part 3 of the stuIing-EOX. The threads on the neck sections are so arranged that their continuity will not be interrupted when the stuing-box sections are assembled. The cap also assists to hold the sections together.

Within the stuffin -boX is arranged a cylindrical casing 10 wich is Open at both of its ends and has a tubular stem 11 extending into the opening 8 of the neck 7 and also into The stem is threaded on the inside to receive a closing-plu 12, and also contains a spring-pressed folower12, the spring 13 belng interposed between the follower and the bottom of the plug 12', the latter also serving to regulate the tension of the spring 13. The casin 10 is spaced from the inner walls of the stu g-boX.

Inside thecasing are arranged cup-sh. ped packing rings 14 and 15, respectively, the cupped ends of which face one another. These rings project slightly beyond the ends of the casing and between said projecting ends and the end walls of the stuffing-box are interposed iat packing-rings 16 having an inside diameter slightly greater than the diameter of the rod 17 so that they will not interfere with the vibration of said rod.

Specification of Letters Patent.

Application led May 2, 1907. Serial No. 371,447.

Patented Nov. 2e, 19o?.

Against the cupped ends of the rings 14 and 15 are placed packing-rings 18 which are -made conical at one end to correspond to said cupped ends and fit snugly'thereagainst. Between the rin s 18 is a spring 19 for pressing said rings tig tly against the rings 14 and 15. The inside ofthe casing 10 not occupied by the spring and acking-rings herein described will be illid with small shot or spheres 20 mixed with graphite up to the follower 12a. The shot or spheres will be of suitable antifriction metal or gra hite and.

the like. The s ring-pressed .fol ower 12a compresses the s ot around the rod 17 andtakes upwear of that portion which is in contact with the rod. The rings 18 may be dispensed with if the packing is applied to nonvibrating parts.

The parts inside the casing form a steamtight packing for the rod and4 effectively prevents leakage, but if any such should take place it would be held in the stuffingbox. As the casing 10 is loose in the stuffingbox it is free to move with the rod if thelatter should have any lateral motion or vibration, andsuch movement of the casing will not impair the efficiency of the packing. The stuffing-box is made in two sections as stated in order that the arts inside thereof may be ut in place, and access to the casing for t e urpose of replenishing the shot can be readi y had upon removing the cap 9 and the plug 12.

1. A rod-packing comprising a stuffingboX, a casing loose therein and surrounding the rod, and a packing inside the casing around the rod. l

2. A rod-packing comprising a stuiiingbox, a casing loose therein and surroundin the rod, a packing inside the casing aroun the rod, and packing-rings between the aforesaid packing and the end walls of the stuffing-box.

3. A rod-packing comprising a stuflingbox, a casing loose therein `and surrounding the rod, spaced packing-rings inside the casacking of spheres in the 5. A rod-packing comprising a stuffingbox, a casing loose therein and surrounding the rod, spaced cup-shaped packing-rings inside the casing, s ring-pressed conical packing-rings fitting t e cup ed ends of the aforesaid packing-rings, an spheres in the casing between the conical rings.

6. A rod-packing comprising a stuffingbox having on one side a neck provided with an o ening communicating with the interior of t e stufIing-box, a casin loose in the stuffing-box and havin a tu ular stem extending into the opening in the aforesaid neck, a packing including a lurality of spheres inside the casing, an a springressed follower in the aforesaid stem bearlng on the spheres.

7. A rod-packing comprising a stuffingboxv having on one side a neck provided with an o ening communicating with the interior of t e stufling-box, a casin loose in the stuffing-box and havin a tu ular stem extending into the openlng in the aforesaid a packing of neck, spaced packing-rings inside the casing, a packing of spheres in the casing between the rings, and a spring-pressed follower in the aforesaid tubular stem bearing on the spheres.

8. 'A rod-packing comprising a stuffingbox having on one side a neck provided with an opening communicating with the interior of the stuffing-box, a casing loose in the stuffing-box and having a tubular stem ex 

